View Javadoc

1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  
20  package org.apache.myfaces.orchestra.conversation.basic;
21  
22  import org.apache.commons.logging.Log;
23  import org.apache.commons.logging.LogFactory;
24  import org.apache.myfaces.orchestra.conversation.ConversationMessager;
25  
26  /**
27   * Handle user-specific notifications about conversation anomalies, when we are running
28   * in a plain servlet environment (no JSF etc).
29   * <p>
30   * Unfortunately there is no standard way of displaying a message to a user in such an
31   * environment (except possibly throwing an exception, forcing the standard error page
32   * to be shown). This implementation therefore just logs the message to the standard
33   * server application log.
34   * <p>
35   * If you do not like the default behaviour then implement your own version of this
36   * class and configure your alternative as the standard "Conversation Messager"
37   * instead. See the documentation on interface ConversationMessager for details.
38   * <p>
39   * As required by the ConversationMessager interface, all methods on this class are thread-safe.
40   */
41  public class LogConversationMessager extends ConversationMessager
42  {
43      private final Log log = LogFactory.getLog(LogConversationMessager.class);
44  
45      public void setConversationException(Throwable t)
46      {
47          log.info("Conversation exception occurred", t);
48      }
49  
50      public void setConversationNotActive(String name)
51      {
52          log.info("Conversation not active: " + name);
53      }
54  }